CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Lixia Li,Xiuqi Li,Feiyue Li,Xiang Zhen,Mingdong Dong,Jinxing Long,Xiaobing Wang,Zhiyong Jiang
Harnessing photocatalyzed hydrogen atom transfer (HAT) for the precise activation of C–H/O–H bonds is a pivotal yet challenging strategy to selectively drive oxidative C–C bond scission in renewable lignin, yielding value-added chemicals with exceptional selectivity. Herein, we present a metal-free photochemical strategy that enables selective C–C bond scission in lignin via a unique synergistic HAT pathway driven by triplet-excited 2-ethylanthraquinone (EAQ*) and hydroxyl radicals ( • OH) generated in situ from EAQH 2 and O 2 . Under simulated natural conditions, this process achieves a benzaldehyde yield of 146.6 mol% from a lignin-derived phenolic dimer. Mechanistic investigations reveal that preferential activation of the C α -OH in lignin facilitates a tandem HAT process, forming alkoxy radical intermediates that undergo β –scission to produce benzaldehyde, as corroborated by extensive control reactions and density functional theory calculations. Furthermore, this straightforward protocol efficiently cleaves the C–C bonds of technical kraft lignins, providing a rapid, scalable, and metal-free protocol for lignin valorization under mild conditions.
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高影响因子
ENERGY
·
2025
·
IF 9.4
Xiaomeng Yang,Zhen Zhang,Xiangang Li,Jianshe Wang,Dan Wu,Yongsheng Zhang,Chunbao Charles Xu
The production of phenolic monomers from agricultural waste biomass is environmentally friendly, economical, and sustainable. Here, we synthesized floral-like Ni-Co alloy catalysts via hydrothermal method for hydrodeoxygenation (HDO) of corn stalk lignin (CSL) to phenolic monomers. The optimized Ni 1 Co 2 Al-LDO-500 catalyst exhibits excellent catalytic performance for HDO of CSL, with lignin oil and phenolic monomer yields as high as 63.37 wt% and 46.63 wt% at 240 °C, respectively. XRD and TEM characterization confirms the formation of Ni-Co alloys, and XPS analysis reveals that the electron transfer between Ni and Co in the catalysts enhances the efficient activation of H 2 and the hydrogenation breaking of C-O bonds. Moreover, the possible reaction pathways and reaction mechanisms of β-O-4 bonds hydrogen cleavage reaction over NiCoAl-LDO catalysts were elucidated by combining model reaction and 2D HSQC NMR analyses. Understanding the synergistic effect of Ni-Co alloy and acid site in NiCoAl-LDO catalysts in the HDO of CSL facilitates the efficient depolymerization of lignin for the production of phenolic products.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Hai Li,Qian Xue Hua,Xiao Hua Zhao,Xin Yu Lu,Dong Wei He,Yun Qi Li,Yang You
One-component epoxy resins have attracted considerable interest due to their superior storage stability and processability, with advancements in their development being driven by chemical innovations aimed at regulating the thermal latency of epoxy curing systems. In this study, a preparation method for one-component epoxy resins was proposed, which is highlighted by the excellent storage stability, feasibility, renewability of feedstocks, and enhanced thermal resistance of the cured resin. Specifically, the curing system was composed of aromatic bismaleimide, lignin-derived triarylimidazole, and commercially available epoxy prepolymers. During the mixing stage, the electron-rich imidazole interacted with the electron-deficient maleimide, resulting in the formation of complexes through dipole interactions and π-π stacking. This interaction effectively sequestered the nucleophilic lone pair electrons and electrophilic epoxy groups, significantly improving the storage stability of the curing system at ambient temperature without the need for prepreparation of latent curing agents. As the temperature increased, the weak interactions diminished, releasing the active imidazole, which initiates the homopolymerization of the bismaleimide component and the epoxy component as well as their copolymerization. Consequently, a hybrid network that incorporates both bismaleimide and epoxy resins, with lignin-derived triarylimidazole serving as the linkages, was formed. The bismaleimide resin component substantially enhanced the thermal resistance of the hybrid resin, achieving a lap-shear strength of 3.31 MPa at 250 °C. These findings provide valuable insights for the advancement of one-component epoxy resins and exemplify the high-value utilization of lignin derivatives.
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Materials Today Chemistry
·
2025
·
IF 6.7
Lanrui Yin,Fei Zhou,Keling Yan,Yashi Pu,Guanghui Li,Di Tian
The weak interaction between transition metal selenides and carbon materials caused difficulties for their combination. In this study, a novel strategy based on lignin and Co nanoparticles was used for modifying electrospun carbon nanofibers to boost the growth of Ni 3 Se 4 . Interestingly, various types of lignin could induce the aggregation and distribution of Co nanoparticles, leading to different crystal structures, morphologies, and amounts of Ni-based selenides. Among them, sodium lignosulphonate brought about Co nanoparticles inside nanofibers and the formation of S–Co bonds, leading to the massive growth of Ni 3 Se 4 nanosheets with high redox activities and abundant active sites. As a result, the sample modified by Co and sodium lignosulphonate (CFLS@NiSe) with a diffusion-controlled hybrid capacity displayed the highest value of 384.00 C g −1 (853.33 F g −1 ) at 0.5 A g −1 and acceptable rate performance (capacity retention of 39 %, from 0.5 to 10 A g −1 ), which exceeded many reported transition metal selenide-carbon composites. Furthermore, a hybrid solid-state supercapacitor (CFLS@NiSe//bamboo derived active carbon) with a high energy density of 61.33 Wh kg −1 was assembled, which could supply energy for light emitting diode and deliver a capacity retention of 94.15 % as well as Coulombic efficiency of 92.29 % after 10,000 cycles. Compared with traditional modification strategies, this work proposed a novel, facile, feasible, low cost and environmentally friendly method to modify carbon nanofibers to regulate the growth of selenides, which will offer ideas for the design of composite materials.
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JOURNAL OF THE ENERGY INSTITUTE
·
2025
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IF 6.2
Zilu Zhang,Chenguang Zhang,Boyang Sun,Xiaofei Xu,Xiaobo Chen,Zhihe Li,Shaoqing Wang
Lignin and heavy oil (HO) possess complementary properties, thus rendering their synergistic co-pyrolysis a promising strategy to overcome the limitations of their individual pyrolysis processes. This study is designed to advance biomass valorization, facilitate the clean utilization of heavy oil, and enable the production of high-quality fuels. In this study, the co-pyrolysis behavior of lignin and HO was investigated using an integrated TG-FTIR-MS system combined with fixed-bed pyrolysis experiments, with a focus on the kinetic characteristics and synergistic effects at different HO blending ratios (10 %, 30 %, and 50 %). The results revealed a significant overlap in the primary pyrolysis temperature ranges of lignin (152.43°C-598.77 °C) and HO (68.68°C-402.34 °C). Kinetic analysis based on the FWO and DAEM methods demonstrated that the average activation energy during co-pyrolysis decreased progressively below the theoretically calculated values with increasing HO content. Fourier transform infrared analysis indicated enhanced C–H absorption peak intensities and reduced C–O peaks. A notable synergistic effect was observed at the C–H absorption peak when the HO blending ratio reached 50 %, which confirmed the feasibility of co-pyrolysis. Fixed-bed pyrolysis experiments further confirmed that co-pyrolysis increased the yields of phenolic and aromatic compounds, thereby improving the overall quality of the pyrolysis oil. This study provides fundamental data to support the development of innovative co-conversion pathways for lignin and petroleum-based HO.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jia-Qi Wu,Qing He,Zhuang-Zhuang Li,Si-Wen Li,Wei Wang,Jian-She Zhao
Lignin, a major component in renewable plant biomass, serves as a potential source of high-value aromatic chemicals. However, efficiently decomposing lignin while maintaining its aromaticity for fossil fuel substitution remains a significant challenge. This study synthesized a [VimAm]Br@POM@AC catalyst, composed of a Keggin-type polyoxometalate (POM) modified by ionic liquid ([VimAm]Br) and supported on activated carbon (AC). The response-surface methodology was applied to explore the catalytic performance of this catalyst in the oxidative depolymerization of lignin β-O-4 model compounds. Under the reaction conditions of 160 °C, 3 mL H 2 O 2 , and 0.4 g catalyst within 8 h, the conversion rate of lignin model compounds reached 83.01 %. The reaction generated diverse aromatic products, with the selectivity of methyl mandelate and methyl benzoate reaching 27.70 % and 59.02 %, respectively. Mechanistic studies revealed that the [VimAm]Br@POM@AC catalyst selectively cleaves C O bonds in β-O-4 dimers, facilitating the formation of aromatic compounds. Moreover, FT-IR spectroscopy and SEM analysis confirmed the good stability of the recovered catalyst. This work achieves efficient directional conversion of lignin model compounds through the design of a multilevel-structured catalyst, precise optimization of reaction conditions, and innovative mechanistic interpretation. It offers a novel strategy with both academic significance and application potential for the high-value utilization of biomass resources.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Qianqian Yu,Xiaohan Sun,Zejun Pan,Meiying Wu,Zhihui Dong,Yunyun Xia,Wan Nong,Xin Li,Zhaolin Yang,Yudong Li,Chengyu Wang
With the exhaustion of fossil fuels, prior phase change materials are characterized by such drawbacks as poor thermal conductivity, weak shape stability, and high costs. Therefore, the preparation of phase change materials with brilliant thermal-insulating properties, high thermal conductivity, and leakage-free properties has emerged as a crucial research focus. Herein, a sericultural mulberry branch-derived (SMB) composite phase change material was prepared by deep eutectic solvent pretreated SMB and vacuum-assisted impregnated paraffin wax with cupric oxide (CuO). The anisotropic porous SMB features a whole trunk structure similar to pith, xylem, and bark, which is closely tied physiological functions and provides a foundation for thermal storage and release. Triple layer porous structure of SMB as supporting material determined the excellent shape stability of composite phase change material. The addition of CuO significantly enhances the thermal conduction capacity. After 50 cycles heating, CuO/PW/DSMB retained 98 % of latent heat capacity and enthalpy change for heat absorption was measured at 91.66 J/g, which represents a decrease of 17.94 J/g, demonstrating a significant superior latent thermal effect and excellent thermal stability. Moreover, the triple layer of SMB uneven thermal transfer generate a self-regulating thermal management functional structure to achieve mutual thermal compensation. In summary, this composite phase change material, with its excellent properties of thermal insulation, high thermal conductivity, leakage-free nature, low cost, and easy availability, has broad application prospects in thermal energy storage and energy conservation.
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CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Bole Ma,Zhengtao Wei,Liheng Chen,Shiqiang Tu,Xueqing Qiu
The development of superhydrophobic coatings for wood protection using biomass materials signifies a trend in future advancements. However, ensuring the durability of biomass-based superhydrophobic coatings under harsh conditions remains a formidable challenge. Here, rod-like ZnO/lignin nanosphere (LNS) composites are obtained using co-assembly, followed by changing the addition time of LNSs to control their sizes. The composites demonstrate good performance in visible-light photocatalysis test, about 47 % of the degradation of methylene blue solution within 150 min. A robust and multifunctional superhydropphobic coating is further fabricated by as-prepared ZnO/LNS composites on wood surface, with a contact angle of 163.7 ± 0.5° and a sliding angle of 2.1 ± 0.2°. Owing to the reinforcing effect imparted by rod-like ZnO, the coating demonstrated resistance to 20 cycles of abrasion and withstood 240 cycles of tape peeling. The coating also shows robustness against other mechanical and chemical damages. Furthermore, through the synergistic effect of ZnO and LNSs, the coated wood demonstrates outstanding visible light-driven photocatalytic activity and flame retardation for practical application. This study aims to facilitate the improvement and development of inorganic/lignin composites, thereby offering a novel pathway for the fabrication of modified wood products with high-performance.
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Polymers
·
2025
·Vol. 17
·期 4
·474
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IF 4.9
Zhipeng Yu,Yang Min,Qi Ouyang,Yuting Fu,Ying Mao,Shuanglin Xiang,Xiang Hu,Liuyun Jiang
It is a great challenge to obtain an ideal hydrogel for the clinical treatment of intrauterine adhesion (IUA) disease. Here, a novel injectable chitosan–lignin/poloxamer hydrogel loaded with platelet-rich plasma (CL-PF127@PRP) was prepared by self-assembly at room temperature. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), rheological analysis, and injectable writing were used to characterize the structure of the hydrogel. The results confirmed that the amino group of chitosan and the sulfonic group of sodium lignosulfonate were ionic-crosslinked by electrostatic attraction, which stabilized the three-dimensional structure of the PF127 hydrogel loaded with PRP, and PRP made the porous structure gradually become tight. Moreover, the CL-PF127@PRP hydrogel displayed good injectability and a solid state. The soaking experiment showed that the CL-PF127@PRP hydrogel had suitable degradation at pH = 7 and a good PRP release rate (PRP release 70% at 96 h). Cell experiments in vitro demonstrated that the CL-PF127@PRP hydrogel possessed good biocompatibility, an anti-inflammatory function, and pro-angiogenic activity. Furthermore, an animal experiment of skin wound and IUA confirmed that the skin wound closure rate of the CL-PF127@PRP hydrogel was over 50% on the seventh day. PRP improved the thickness of the endometrium and uterus receptivity, suggesting that the CL-PF127@PRP hydrogel offers great promise for the clinical treatment of IUA.
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BIOMASS & BIOENERGY
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2025
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IF 5.8
Hanping Chen,Jiawen Zeng,Zhiqiang Chen,Mingwei Xia,Ying Gao,Danchen Zhu,Ziyue Tang,Haiping Yang,Yingquan Chen,Xianhua Wang
To improve the yield and fluorescence characteristic of lignin-based carbon dots, a two-step process of hydrothermal and oxidation was proposed to achieve efficient preparation of intense fluorescent lignin-based carbon dots (LCDs) in this study. N, S co-doped LCDs (NS-LCDs) and hydrothermal char were prepared by using mild sulfanilic acid as additive, then hydrothermal char as carbon source was oxidized and exfoliated to prepare high-yield oxidized LCDs (O-LCDs) via using NaOH and H 2 O 2 . It was found that the yields of NS-LCDs initially increased and then decreased with hydrothermal temperature increasing, reaching the maximum value of 5.71 % at 200 °C. And more than 50 % of the hydrothermal char was converted to O-LCDs by oxidative stripping, which resulted in the total yield of LCDs reached to 17.13 % at 200 °C. Meanwhile, the fluorescence quantum yield of NS-LCDs showed a similar trend, obtained a maximum value of 18.00 % at 200 °C, which was the same as content of C sp2 and C-N in XPS results. And the average particle size of NS-LCDs was less than O-LCDs, the average particle size 180-NS-LCDs was 3.61 nm, while that of 180-O-LCDs was increased to 3.92 nm. In addition, when the temperature was higher than 180 °C, the fluorescence lifetime of NS-LCDs was prolonged, which might be related to N and S doping, and 200-NS-LCDs showed good acid stability, temperature stability and photobleaching resistance. This study provides guidance for the application and preparation of high-quality LCDs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hongxi Zhang,Zhongke Li,Xiande Yang,Meng Li,Liang Wei,Jing Yang
Lignin is anticipated to serve as a replacement for dwindling fossil fuel resources owing to its abundant sources and renewable nature. The electrochemical oxidation technique for depolymerizing lignin has garnered significant interest for its environmentally friendly and mild operating conditions. Nevertheless, the current utilization of auxiliary electrolytes, predominantly organic bases, ionic liquids, and other specialized substances, poses a constraint on the widespread adoption of this approach. Furthermore, there is a scarcity of instances where electrochemical technology has been employed to depolymerize the α-O-4 bond in lignin for the production of highly selective acetals. In this study, a sodium chloride/methanol (NaCl/MeOH) system was utilized for the direct depolymerization of the α-O-4 bond in a lignin model molecule, specifically benzyl phenyl ether (BPE). The optimal conditions resulted in a 95.2 % conversion rate of the BPE substrate and a high yield of 94.5 % for the main product, benzaldehyde dimethyl acetal(Bda). This research offers a promising approach for the electrocatalytic depolymerization of α-O-4 bonds in lignin, leading to the selective production of acetal chemicals using a common auxiliary electrolyte at room temperature in just 2 h.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Meichen Zhang,Syed Zaheer Ud Din,Jianzhen Mao,Zongwei Guo,Feng Xu
This study presents a readily synthesized deep eutectic solvent composed of guanidinium hydrochloride and lactic acid (GH/LA) for refining various industrial xylose residues (delignification and non-delignification), addressing industrial challenges caused by the accumulation of residues. Under mild conditions (120 °C for 2 h), lignin was efficiently extracted, leaving cellulose intact in the solid fraction. The isolated cellulose exhibited a theoretical sugar yield of 100 % within 48 h, which was attributed to the optimal lignin content (6.15 %) remaining in the cellulose residue. The recovered lignin demonstrated high purity (93.36–97.95 %), low molecular weight (2786–3089 g/mol), moderate polydispersity (2.29–2.37), remarkable thermal stability, and potent antioxidant activity (IC 50 =1.25 mg/mL). Comprehensive analysis confirms GH/LA DES pretreatment as a simple and effective method for efficient industrial waste utilization.
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